Union-bottom-finishing machine



ELWIRTH AND C. A. DEMMLER.

UNION BOTTOM FINISHING MACHINE. APPLICATION HLED FEB. 24. 1911..

Patented Feb. 10,1920.

2 SHEETS-SHEET I- E. WIRTH AND 0. A. DEMMLER.

UNION BOTTOM -FINISHIN G MACHINE;

APPLICATION FILED FEB. 24. I917.

Patented Feb. 10, 1920.

12 SHEETS-SHEET '3.

E. WIRTH AND C. A. DEMMLER.

UNION BOTTOM FINISHING MACHINE. APPLICDATION FILED FEB. 24. 1917..

1,330,508. Patented Feb. 10,1920.

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UNION BOTIOM FINISHING MACHINE- APPLICATION FILED FEB. 24. 1917.

1,330,503, Patented Feb. 10,1920.

l2 SHEETS- SHEET 5.

diet/eases: I ju/enzfi 7'6 "/m v d E. WIRTH AND C. A. DEMMLER.

UNION sonom FINISHING MACHINE.

APPLICATION HLED FEB. 24, I917.

. Patented Feb. 10,1920.

12 $HEETS-SHEET 6.

E. WIRTH AND C. A. DEMIVILER.

UNION BOTTOM FINISHING MACHINE.

APPLICATION FILED FEB, 24, I937.

1,330,508. v Patented Feb. 10,1920.

6 .7 I2 SHEETSSHEET 7.

7 122 P2 alga E. WIRTH AND 0. A. DEMMLER.

UNION BOTTOM FINISHING MACHINE. APPLICATION FILED FEB. 24, 1917.

I2 SHEETS-SHEET 8- woeaaeex /i b /l E. WIRTH AND C. A. DEMMLER.

- UNIONBOTIOM FINISHING MACHINE.

APPLIQATION FILED FEB. 24, NHL

1,330,508. I Patented Feb. 10,1920.

Q (R V w7aa 6aa 4 M @wfgffig E. WIRTH AND C. A. DEMMLER.

UNION BOTTOM FINISHING MACHINE.

APPLICATIQN FILED FEB. 24. 1917.

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umom BOTTOM FINISHING'MACHINE. APPLICATION FILED FEB. 24,1917.

1 330,508, Patented Feb. 10, 1920.

I2 SHEETS-SHEET I2- 7 .the rotation of the'tap is stopped, the work are completed simultaneously -onrrnn s'rn'rns rnrnnr orrion.

EMIL WIR'II-I LAN D CHARLES A. DEMMLER, 0F KEWANEE, ILLINOIS, ASSIGNORS, BY

IVIESNE ASSIGNMENTS, T0 WAL'WORTH MANUFACTURING- COMPANY, A. CORPO- RATION OF MASSACHUSETTS.

UNION-BUTTCHI-FINISHING MACHINE.

To all whom it may concern:

Be it known that we, EMIL WIRTH and CHARLES A. DEMMLEJR, citizens of the United States, and residents of, Kewanee, in the county of Henry and State of Illinois, have invented certain new and useful Improvements in Union-Bottom-Finishing Machines, of which the following is a specification.

Our inventionrelates to means for finishing pipe fittings and has particular'refen enceto-anovel machine adapted to finish a shoulder on one portion of, a pipe union and to thread the .same. 7 K I .To finish a union bottom it is necessary that one end of the same be threaded, and that a shoulder and seat be machined on its opposite end. This seat cooperates with the seat of the interfitting portion of the union andthe shoulder engages an inwardly extending flange of the threaded ring-that holds the interfitting portions of the complete union in theirproper relative positions. On account of the inter-relation of these parts, it is necessary that they be machined with great accuracy. Furthermore, in view of the relatively low price at which these fittings must be sold, the work must be done economically. It has heretofore been the practice to finish fittings such as herein referred to intwo or more operations. In the machine which we have devised and here disclosed, the several finishing' operations heretofore required in a fitting of. this sort that is, in one operation. i 7

As a further economic advantage, we have obviated the necessity for reversing the tap or chuck to withdraw the tap from the work.

The desired result is accomplishedby ro-' tating both the tap and the chuck in the same direction, the former at a higher speed than the latter, which carries the work. When the tapping operation is complete,

continuing its rotation. In that manner the work is turned ofi the tap. 1

The finishing operation which serves to form the inner or shoulder end of the article is performed by stationary tools having motion only in. a plane normal to the axis of rotation of the work, but whose position is adjustable in a direction parallel to the axis of rotation of the work.

Specification of Letters Patent. Patented 10, 1920. Application filed February 24, 1917. Serial No. 150,697.

means for rotating the work-holding means,

a tap, means for-rotating said tap in a direction corresponding tothe rotation of said work' but at a higher speed,means operative simultaneously with the threading operation for finishing the shouldered end of. the fitting and means for automatically stopping the rotation of said'tap, whereby the work is backed off from said tap. The details of the machines such as described will be better understood in connection with the drawings and the i scription.

In the drawings: Figurel is a plan view of the two units of a machine such as contemplated by us;

Fig. 2 is a front elevation of the same two units;

Fig. 3 is a rear elevation; Fig. 4: isan elevation of the right side of the machine as vievx' ed' in Fig. 2; Fig. '5 is a view of he left machine as viewed in Fig. 2;

Fig. 6 is a partial sectional View on the line 66 of Fig.2;

Fig. 7 is an enlarged fragmentary detail accompanying de side of the of the clutch and clutch-operating mechanism; r

Fig. 8 is a side elevation of thezsame, partly in section, on the line 88 of Fig- 7 Fig. 9 is a view similar to Fig.8,except that it is taken from the opposite side of Fig. the section being on the line 9 -9; of Fig. I

F ig. 1O is a plan view showing portions of the construction shown in Figs. 7 to 9 inclusive Figsz ll and 12 are face and edge views calsection through the tap and chuck spindles and the operating devices therefor;

Fig. 18 is a sectional view on the line 1818 of Fig. 17; v

Fig. 19 is an end View of the chuck;

Fig. is a sectional view on the line 20-20 of Fig. 19;

Fig. 21 is an. enlarged detail of the chuck and-tap holding devices, a union bottom being shown in section after. it has been completed;

Fig. '22 is a sectional view on the line 22-22 of Fig. 21;

Fig. 23 is a plan view of the tool post blocks shown in Figs. l5'and 16;

Fi 24 is an enlarged sectional view showing the tap-holding means;

Fig. 25 is a sectional view on the line 2525 of Fig. 24; j

Figs. 26 and 27 are side and end views respectively of the finishing tool employed for forming the flanged end and seat of the fitting;

Figs. 28 and 29 are end and face views respectively of the co5perating adjustment block by means of which the tool shown in Figs. 26 and 27 is adjusted andsecured, and

, Fig. 30 is a perspective view of the union part on which the present machine is intended to operate.

In the drawings, it will be seen that inv suitable bearings in the frame is mounted a drive pulley 35, which may be connected by a beltto a prime mover. Through a pinion 36 and gear 37 motion is transmitted to the main shaft 38. This shaft provides power for all of the units. WVhile we have shown but two of such units, a satisfactory installation includes four thereof. This is substantially the maximum number which may be under the charge of one operator or workman.

The main shaft extends from side to side ofthe machine and terminates in a pinion 39' on the overhung end of the shaft. ll: means of the train of reducinggears shown in edge view in Fig.7 2 and in side elevation in Fig. 5, motion is imparted to the cam shaft 40, which likewise extends from side to side of the machine.

Inasmuch as each of the units is a duplicate of the other, we will describebut one thereof. 7 I

The work-holding c7m0lc.The means ,em ployed for holding the work, which in this instance is the union bottom. is best shown in Figs. 2,17. 19, 20, 21 and 22. Pivoted to a head 41 and mounted for angular movement in suitable longitudinal slotsj42 therein are clamping jaws 43. to hold the jaws in expanded position. The work-engaging block 45, which is secured to the outer end of each jaw .43, is provided with av rib or shoulder 46, which acts as a stop to engage the portion of the union which we. have marked47 to accurately locate-the same axially in the chuck. As a means for causing the clamping or gripping action of. the jaws 43. we provide the cylinder or sleeve 48, which slidably engages the the operator.

The springs 44 tend exterior of the head 41 and which is provided with longitudinal slots 48 registering with slots 42 in head 41. The bottoms of these slots at their outer ends are inclined or flared with respect to the axis of the sleeve. Shoes or contact pieces 49, carried by the jaws 43, engage these slots, and as the sleeve is moved outwardly relativeto the jaws thejaws are moved toward each other. Both the head 41 and the sleeve 48 are rotat able in unison, although relatively longitudinally movable. Spring means are provided which tend to maintain the sleeve 48 in its outer position; that is, the position in which the jaws are contracted. The springs 50 and plungers 51, shown in Fig. 20, act to secure this result, while-as an additional means we provide the mechanismshown in Fig. 5. It will be seen that a band or yoke 52 encircles the sleeve 48, and that the trunnions 53 on the band are engaged bya yoke 53 operated by the chuck lever 54. A link i 55 connects one end of the levertfi} an expansion sjoring56. i i-stop 57 tends to main tain the link 55 in proper position. The clevis 55 (Fig. 5), to which link 55 is attached, abuts against the end of the spring and band 52gforces the sleeve outwardly,

causing the blocks 45 to clamp the work. To release the work after the finishing operation is completed, the lever 54 is moved in the opposite direction, breaking the toggle, and since'the clevis is limited in its movement outwardly, the sleeve 48 is drawn in wardly, allowingthe jaws 43 50 be spread apart by the sprin s 44." The device here described. is also useful as a means whereby fittings of the same nominal size but'subject to the slight variations in dimensions incident to the process of manufacture, may be tightly gripped by the work engaging jaws 45, without voluntary adjustment by It will be noted that the work-holding devices are not automatic in character. the work being clamped and re- 7 leased solely at the will of the operator.

' that on a base 58 wemount for parallel sliding movement a pair of tool post blocks 59,,

60,. each ofwhi-ch is provided on its under surface with a rackfil, 62'. In the tool post When the lever 54. is actuated, the

full thread or notch at 67.

face 63 We mount, in asuitable space,the block 64:, best shown in Figs. 28' and 29. The tool 65, best shown in Figs. 26 and 27,

. is provided with a serrated edge which engages the correspondingly serrated edge of the block 64. As a means for providing for exact adjustment, even to the extent of onehalf of a notch, we provide the block 6% with suchnumber of notches or teeth as will necessitate one-half of a notch at one edge and a full notch at the other edge. I In Fig. 28 the half notch is indicated at 66, and the By reversing the block in its opening, an adjustment of the tool to one-half the width of a thread or notch is provided. It will be noted that each of the posts is provided with? one of the" tools described, the cutting edge of the tool being located in a line parallel to the trans verse axis of the work. The cutting edge of the tool is shaped as shown in Fig. 27. The edge 68 of the tool finishesthejseat. The edge 69 outlines or finishes the spud. The edges 70, 71, serve to outline and finish the flange or shoulders, while the edge 72 defines the size of the fitting at the base of the shoulder. In order that the action of the tool on the fitting mav be better understood, we have applied the numerals 68 to 72 inclusive to the fitting shown in section in F ig.

21 and have added the letter a to each of those numerals, it being understood that the surfaces which are marked (38 to 72 inelusive are surfaces which are finished. by the edges which are marked 68 to 72 inclusive in Fig. 27.

As a means for causing proper and synchronous movement of the tool post blocks, we provide the segments 73, 74-, which eugage the racks 61, 62, these segments being adjustably connected by means of the adjusting bolts 75 to segments 76, 77, I'GTQOQC? tively. The last two segments engage for unitary motion and are caused to operate by the arm 78, best Shown in Fig. 2, which is fastened to the segment 77 at 7 9. -The end of the arm carries an anti-friction roll 80. which engages a cam 81, which is mounted on a transverse cam shaft 82. This cam shat engages themain camshaft 4.0 through the beveled gears 83, best shown in 6. Also formed as a projection from the arm 78 are cam'surfaces 8%, 85, which engage with the pins 86, 87, on the cam 81. By reason of the arrangement shown, the tool post blocks are positively moved in each direction; that is, toward and from each other. and furthermore, this motion over a part of the travel of the tool post blocks in each direction is very rapid, in order that the. tool post blocks may be withdrawnsufiiciently to permitof easily replacing the finished bottom with an unfinished one while utilizing a maximum proportion of the cycle of the machine for the necessary slow movement of the tools while work.

in actual contact with the 2 union bottoms of different sizes, it is necesi sary that means be provided for forming.

the flange or shoulder of theunion bottom,

at varying distances from" the end surface 47 (Fig. 21), depending upon the pre'determined deslgnofthe union bottom. This is accomplished by the following means: The base 58 (F igs. 2 and 4:) is adjustably attached to the frame of the machine, its POSP' tion and direct-ion of movement in adjusting the base on the frame being determined by a tongue projecting from'its under surface. which engages a corresponding groove in the frame of the machine. Its position relative to the frame, in a direction parallel to the axis of the spindles, is determined by means of four screws, 58. These screws are arranged in pairs at either end of the base 58, one sorew of each pair extending through the base 58 into a tapped hole in the frame of the machine, the remaining screw of each pair extending only to the adjoining edge of the frame and engagingaitapped hole in the base 58. By proper manipulationof these screws the base 58 may be moved ina direction parallel tothe axis of the spindles of the machine. v

The my? and its h0Zd2'ng -means.This"is f best shown in Figs. 21, 22,24 and 25. The tap, which we have designated 88 in Fig.

21, is of the common, solid, fluted type and may be of any desired length. The tap longitudinally, slida-bly engages a block having a hexagonal periphery, the block being indicated at "89 in Fig. 21. Inwardly projecting lugs 90, shown-in elevation in Fig. 22, cooperate with the-flutes orgrooves in the tapfthe hexagonal {periphery ofthe necessary to. rotate the collar 92, when the tap and collar are withdrawn sufficiently to permit of rotation of the collar. In order to yieldably hold the collar in the position shown in Fig. 24, we provide the spring-pressed balls 93, which are held in the nut 94; p

T he tap operating means-The mecha5 nism which causes the advancement and retraction of the tap is shown; in Figs. 17 and 18. It willbe noted that the tap sleeve 91 extends from end to end of the machine and 'block engaging a corresponding recess in r is supported in the chuck sleeve 95 and in.

to an auxiliary chuck sleeve 102.

the gear 103. The chuck sleeve is integral with the head 4:1, and positively connected. to the sliding sleeve 48, heretofore referred to, and rotates in bearings .96. This sleeve is positively rotated by the gear 97. To he rear end of the chuck sleeve 95 a disk 93 secured and to this .disk is secured the nut 99 by means of the yoke 100. The nut en gages a threaded collar 101, which is keyed The arrangement is such that relative rotation of the sleeves 95 and 102 causes a longitudinal movement of the sleeve 102. The sleeve 102 is splined to the gear 103, the gear being held in a fixed position with relation to its bearing 104. However, the sleeve 102 is, by means of the key 105 and the nut 100, fixedly secured to the sleeve 91. Gears 97 and 103 are engaged respectively by gears 107 and 108, best shown in Figs. 1, 4, 5, 7 and 8. .The latter are each loosely mounted upon a transverse shaft 109, which is positively actuated throughthe miter gears 110 by the main shaft 38. Because of the different sizes of the gears 97 and 107, 103 and 108, it will be seen that the tap sleeve rotates at a higher rate of speed than the chuck sleeve, .but that both rotate in the samedirection. The result is that while the work is rotated, the tap is rotated in the same direction, but at a higher speed and that when the tap is stopped, the work is relatively oppositely rotated and, therefore. backed off, although'its rotation in the same direction and at the same speed is continued. Thus the necessity for reversing the direction of rotation of any of the parts in order to back the work off the tap is obviated.

In order to operate the tap and chuck in proper timed relation we provide the clutch members best shown in Figs. 7 and 8. In

those figures it will be seen that on the shaft 82, which carries the cam 81, are also carried two cams 111, 112, each of which controls the operation of a clutch for connecting the shaft 109 to the gears 108, 107.

. respectively. A bell crank, which is pivoted at 113 and is provided with arms 114i and 115, serves to actuate the clutch members to the extent of withdrawing the clutch pin 116 at the proper time. To the shaft 109 is keyed the disk 117, best shown in Figs. 7-. 11 and 12, the disk being provided with a cam surface 118 and a notch 119. The point 120 of the pin 116, best shownin Figs. 13 and 14, is shaped to engac'e'the notch 119, the pin being longitudinally slidablein a groove in the hub of the gears 107 108. A notch 121 in the pin 116 is adapted to be engaged by the beveled point 122 on the end ,of the arm 115 and retract'the pin, thereby stopping the rotation of the gear.

low part of the cam member 111 or 112. In-

asmuch as the two clutch members areduplicates, the description, of one will suffice.

The gears ust referred to are stopped and started in synchronous relation without attention from the operator, the arrangement of the cams being such that the tap is stopped before the work-holding chuck in order to permit the work to be backed off. However, as an emergency for disconnecting the shaft 109 and stopping the operation of rotation of the shafts 82 and 109, the shafts 40 and 38 continuing to rotate. This means comprises the clutches 123, 12 1, which are actuated by the levers 125, 126, respectively, and both of which levers are simultaneously actuated by the lever 127, which may be manually moved by the hand lever 128. As this requires considerable manual exertion, we prefer to employ the means best, shown in Fig. 6, comprising the operating handle 129, connecting rod 130 and lever 131, having the cam face or end 131 This cam face is adapted to engage with a cam 132, carried by the clutch 123, the arrangement being such that when the lever is throwninto the arc of rotation of the cam, both the clutches 123 and 124. are disengaged and remain in this position until manually engaged.

The operation of the machinels as follows: The machine being in motion, the operator places an unfinished union bottom, or such other piece as may be finished on the machine, between the chuck jaws and clamps the piece in position for finishing by pulling the lever 54: forward. This is done while the cams 111, 112, are in such position that the sleeves 91, 95, are stationary. At that time also the cam 81 will be in such position that the tool posts are separated fully. When the proper time arrives, both the tap spindle and the chuck spindle start rotating practically simultaneously, the ratios of the driving gears being such that the tap spindle rotates at substantially 150 revolutions per minute while the chuck spindle rotates at substantially 100 revolutions per minute I both in the same direction. Thelead screw,

faster than the work, due to its stoppage, the

work is now moving in a relatively reverse while the parts are idle and the tool posts retracted.

In the preferred arrangement where a plurality of units are connected'inthe same machine, the cams are set ninety degrees apart, assuming that ,roui units are employed; Thus the cycle of work as outlined is completed on each unit one-fourth of a cycle in advance of the completion of the U next succeeding cycle. This enables the operator to follow the work in proper succession.

Obviously the machine may to operate upon other styles of work, and, therefore, that the new mechanism here disclosed and the new combination described must not be construed as adaptable only in connection with the finishing of union bottoms. As indicated in the appended claims, the invention is broader than it intended solely for the purpose herein described.

We claim: 7

1. In apparatus of the class described, the combination of a rotary spindle having blank clamping means on one end thereof, means for machining the exterior of an end portion of a blank held by said clamping means, a second rotatable spindle mounted within said first named spindle having a tap on one end, said tap being arranged to thread the interior of the blank'clamped on said rotaryspindle, and means for rotating said spindles at differential speeds to thereby simultaneously machine the exteriorand tap the interior of said blank; substantially as described.

vE2. In apparatus'of the class described, the combination of a rotary spindle having blank clamping means on one end thereof, means for machining the exterior of an end portion of a blank held by said clamping means, a second rotatable spindle mounted within said first named spindle having a tap on one end, said tap being arranged to thread the interior of the blank clamped'on said rotary spindle, means for rotating said spindles at difierential speeds to thereby simultaneously machine the exterior and tap the interior of said blank, and means for stopping rotation of one of said spindles to retract and thereby remove the tap from the threaded blank; substantially as described. a

3. In apparatus of the class described, the combination of a rotary spindle having The operator then releases the fin be 'modified 7 blank clamping means-on one end thereof,

means for machining the exterior of an end portion of a blank held by said. clamping means, a second rotatable spindle mounted within said first named spindle having a tap on one end, said tap being arrangedto thread the interior of the blank clamped on said rotary spindle, means for rotating said simultaneously machine the exterior. and tap the interior of said blank, and." means for stopping rotation of the tap carrying pindle to thereby back-wolf and remove the tap from the interior or the tapped :blank; substantially as described;

4. Inapparatus of the class described,

spindles at 'difierential speeds to thereby the combination of a rotary spindle having 7 blank clamping means on one end thereof, 7

means for machining the exterior of an end portion of a blank held by said clamping means, a second rotatable spindle mounted within said first namedfspindle having a tap on one end, said tap being arranged to thread the interior of the blank clamped on said rotaryspindle, means for rotating said spindles at difierential speeds to thereby simultaneously machine the exterior and tap the interior of said blank, and means for stopping rotation of one spindle and thereby automatically remove the tap from the blank at the completion of the tapping operation; substantially-as described.

5. In apparatus of the class described, the combination of a rotary spindle'having blank clamping means on one end thereof,

means for machining the exterior or an end u portion ofa blank held by said clamping means, a second rotatable spindle mounted within said first named spindle having a tap on one end, said tap being arranged to thread the interior of the blank clamped on 1 Silld' rotaryspmdle, means for rotating said.

spindles at difierential speeds to thereby simultaneously machine the exterior and J tap the interior ofsaid blank, and means for advancing said machining means into operative engagement with said blank; sub-- stantially as described.

6. In apparatus of the class described,

the combination of a rotary spindle having blank clamping. means on one end thereof,

means for machining the exterior of an end portion of a blank held by said clamping means, a second" rotatable spindle mounted within said first-named spindle having a tap on one end, said tap being arranged to thread'the interiorof a blank clamped on said rotary spindle, means for rotating said I spindles at dliferential speeds to thereby simultaneously machine the exterior and tap the interior of said blank, and means for automatically moving saidfcutting means into and out of operative engage ment with said blank; substantially as-de- Y I 130.

scribed. v

7. In apparatus of the class described, the combination of a rotary spindle having blank'clamping means on one end thereof, means for machining the exterior of an end portion of a blank held by said clamping means, a second rotatable spindle mounted Within said first named spindle having a tap onone end, said tap being arranged to thread the interior of a blank clamped on said rotary spindle,'means for rotating said spindles at dififerential speeds to thereby simultaneously machine the exterior and tap the interior of saidblank, and means for automatically moving said tap and said cutting means into and out of operative engagement With said blank; substantially as described.

spindle, means for rotating said spindles in the same direction and a-tdifi erent speeds and-means for causing relative axial movement of said spindles, substantially as'described.

. 9. In a machine for finishing union bottoms, the combination of a pair of concentric hollow spindles, means for causing relative longitudinal movement of said spindles, a Work-holding clamp carried'by one spindle and a tap carried by the other spindle, means for rotating said spindles in the same direction and at diflferent speeds and automatic means for .sequentiallystopping the rotation of saidspindles, substantially as described.

Signed at KeWanee, Illinois, this 14th of February, A. D. 1917.

v 1 EMIL WVIRTH.

CHARLES A. DEMMLER. Witnesses we ALFRED A. HARRISON,

FRED J. TALBo'r'r. 

